Star of HBO drama The Newsroom Alison Pill meant to hit the “delete” button on her phone, but instead hit the “tweet” button.

In her defence, the buttons rhyme and are very close to each other.

The result was a topless picture of herself that spread like wildfire across the Internet, as these things tend to do. She followed up almost immediately by deleting the tweet — and the photo, for real this time — and posting an apology.

Almost a year after the original post went live on Twitter, late night talk show host Conan O’Brien talked to the star about what actually happened.

“It’s a fascinating story involving not knowing that my new Blackberry had a touch screen and responding to somebody on Twitter,” she told him. She had the photo on her phone because she was away from her fiance, and accidentally tweeted the photo instead of deleting it.

“I don’t know. It’s a dumb thing to do I suppose,” she added.

“And now, I’ve realized just how dumb. And so embarrassing, so hideously embarrassing, that for about three months after it happened I couldn’t… every time I met a new person I [kept thinking], ‘Boobs! Nice to meet you, you’ve seen my boobs.'”